﻿using Newtonsoft.Json;
using Newtonsoft.Json.Converters;
using Newtonsoft.Json.Linq;
using System;
using System.Collections;
using System.Collections.Generic;
using System.Data;
using System.Reflection;
using System.Text;

namespace RuoVea.ExUtil;

/// <summary>
/// 描 述：扩展.json序列反序列化
/// </summary>
public static partial class Extensions
{
    /// <summary>
    /// 转成json对象
    /// </summary>
    /// <param name="Json">json字串</param>
    /// <returns></returns>
    public static object Json2Obj(this string Json)
    {
        return Json == null ? null : JsonConvert.DeserializeObject(Json);
    }

    /// <summary>
    /// 转成json字串
    /// </summary>
    /// <param name="obj">对象</param>
    /// <param name="long2Str"> Long类型Json序列化重写</param>
    /// <returns>转成json字符串</returns>
    public static string Json2Str(this object obj, bool long2Str = true)
    {
        var timeConverter = new IsoDateTimeConverter { DateTimeFormat = "yyyy-MM-dd HH:mm:ss" };
        return JsonConvert.SerializeObject(obj, timeConverter);
    }

    /// <summary>
    /// 转成json字串
    /// </summary>
    /// <param name="obj">对象</param>
    /// <param name="datetimeformats">时间格式化</param>
    /// <param name="long2Str"> Long类型Json序列化重写</param>
    /// <returns>转成json字符串</returns>
    public static string Json2Str(this object obj, string datetimeformats, bool long2Str = true)
    {
        var timeConverter = new IsoDateTimeConverter { DateTimeFormat = datetimeformats };
        return JsonConvert.SerializeObject(obj, timeConverter);
    }

    /// <summary>
    /// 字串反序列化成指定对象实体
    /// </summary>
    /// <typeparam name="T">实体类型</typeparam>
    /// <param name="Json">字串</param>
    /// <returns>指定对象实体</returns>
    public static T ToObject<T>(this string Json)
    {
        return Json == null ? default(T) : JsonConvert.DeserializeObject<T>(Json);
    }

    /// <summary>
    /// 字串反序列化成指定对象实体(列表)
    /// </summary>
    /// <typeparam name="T">实体类型</typeparam>
    /// <param name="Json">字串</param>
    /// <returns>指定对象实体(列表)</returns>
    public static List<T> ToList<T>(this string Json)
    {
        return Json == null ? null : JsonConvert.DeserializeObject<List<T>>(Json);
    }
    /// <summary>
    /// 字串反序列化成DataTable
    /// </summary>
    /// <param name="Json">字串</param>
    /// <returns>DataTable</returns>
    public static DataTable ToTable(this string Json)
    {
        return Json == null ? null : JsonConvert.DeserializeObject<DataTable>(Json);
    }
    /// <summary>
    /// 字串反序列化成linq对象
    /// </summary>
    /// <param name="Json">字串</param>
    /// <returns>linq对象</returns>
    public static JObject ToJObject(this string Json)
    {
        return Json == null ? JObject.Parse("{}") : JObject.Parse(Json.Replace("&nbsp;", ""));
    }

    #region 私有方法
    /// <summary>
    /// 过滤特殊字符
    /// </summary>
    /// <param name="s">字符串</param>
    /// <returns>json字符串</returns>
    private static string String2Json(String s)
    {
        StringBuilder sb = new StringBuilder();
        for (int i = 0; i < s.Length; i++)
        {
            char c = s.ToCharArray()[i];
            switch (c)
            {
                case '\"':
                    sb.Append("\\\""); break;
                case '\\':
                    sb.Append("\\\\"); break;
                case '/':
                    sb.Append("\\/"); break;
                case '\b':
                    sb.Append("\\b"); break;
                case '\f':
                    sb.Append("\\f"); break;
                case '\n':
                    sb.Append("\\n"); break;
                case '\r':
                    sb.Append("\\r"); break;
                case '\t':
                    sb.Append("\\t"); break;
                default:
                    sb.Append(c); break;
            }
        }
        return sb.ToString();
    }

    /// <summary>
    /// 格式化字符型、日期型、布尔型
    /// </summary>
    /// <param name="str">字符串</param>
    /// <param name="type">数据类型</param>
    /// <returns>字符型、日期型、布尔型</returns>
    private static string StringFormat(string str, Type type)
    {
        if (type == typeof(string))
        {
            str = String2Json(str);
            str = "\"" + str + "\"";
        }
        else if (type == typeof(DateTime))
        {
            str = "\"" + str + "\"";
        }
        else if (type == typeof(bool))
        {
            str = str.ToLower();
        }
        else if (type != typeof(string) && string.IsNullOrEmpty(str))
        {
            str = "\"" + str + "\"";
        }
        return str;
    }

    #endregion

    #region list转换成JSON
    /// <summary>
    /// list转换为Json
    /// </summary>
    /// <typeparam name="T">泛型</typeparam>
    /// <param name="list">列表</param>
    /// <returns>JSON字符串</returns>
    public static string ListToJson<T>(this IList<T> list)
    {
        object obj = list[0];
        return ListToJson<T>(list, obj.GetType().Name);
    }

    /// <summary>
    /// list转换为json
    /// </summary>
    /// <typeparam name="T">泛型</typeparam>
    /// <param name="list">列表</param>
    /// <param name="JsonName">JSON字段名</param>
    /// <returns>JSON字符串</returns>
    private static string ListToJson<T>(this IList<T> list, string JsonName)
    {
        if (list.Count == 0)
        {
            return "";
        }
        StringBuilder Json = new StringBuilder();
        if (string.IsNullOrEmpty(JsonName))
            JsonName = list[0].GetType().Name;
        Json.Append("{\"" + JsonName + "\":[");

        for (int i = 0; i < list.Count; i++)
        {
            T obj = Activator.CreateInstance<T>();
            PropertyInfo[] pi = obj.GetType().GetProperties();
            Json.Append("{");
            for (int j = 0; j < pi.Length; j++)
            {
                Type type = pi[j].GetValue(list[i], null).GetType();
                Json.Append("\"" + pi[j].Name.ToString() + "\":" + StringFormat(pi[j].GetValue(list[i], null).ToString(), type));
                if (j < pi.Length - 1)
                {
                    Json.Append(",");
                }
            }
            Json.Append("}");
            if (i < list.Count - 1)
            {
                Json.Append(",");
            }
        }
        Json.Append("]}");
        return Json.ToString();
    }
    #endregion

    #region 对象转换为Json
    /// <summary>
    /// 对象转换为json
    /// </summary>
    /// <param name="jsonObject">json对象</param>
    /// <returns>json字符串</returns>
    public static string ToJson(this object jsonObject)
    {
        string jsonString = "{";
        PropertyInfo[] propertyInfo = jsonObject.GetType().GetProperties();
        for (int i = 0; i < propertyInfo.Length; i++)
        {
            object objectValue = propertyInfo[i].GetGetMethod().Invoke(jsonObject, null);
            string value = string.Empty;
            if (objectValue is DateTime || objectValue is Guid || objectValue is TimeSpan)
            {
                value = "'" + objectValue.ToString() + "'";
            }
            else if (objectValue is string)
            {
                value = "'" + ToJson(objectValue.ToString()) + "'";
            }
            else if (objectValue is IEnumerable)
            {
                value = ToJson((IEnumerable)objectValue);
            }
            else
            {
                value = ToJson(objectValue.ToString());
            }
            jsonString += "\"" + ToJson(propertyInfo[i].Name) + "\":" + value + ",";
        }
        jsonString.Remove(jsonString.Length - 1, jsonString.Length);
        return jsonString + "}";
    }

    #endregion

    #region 对象集合转换为json
    /// <summary>
    /// 对象集合转换为json
    /// </summary>
    /// <param name="array">对象集合</param>
    /// <returns>json字符串</returns>
    public static string ToJson(this IEnumerable array)
    {
        string jsonString = "{";
        foreach (object item in array)
        {
            jsonString += ToJson(item) + ",";
        }
        jsonString.Remove(jsonString.Length - 1, jsonString.Length);
        return jsonString + "]";
    }
    #endregion

    #region 普通集合转换Json
    /// <summary>    
    /// 普通集合转换Json   
    /// </summary>   
    /// <param name="array">集合对象</param> 
    /// <returns>Json字符串</returns>  
    public static string ToArrayString(this IEnumerable array)
    {
        string jsonString = "[";
        foreach (object item in array)
        {
            jsonString = ToJson(item.ToString()) + ",";
        }
        jsonString.Remove(jsonString.Length - 1, jsonString.Length);
        return jsonString + "]";
    }
    #endregion

    #region  DataSet转换为Json
    /// <summary>    
    /// DataSet转换为Json   
    /// </summary>    
    /// <param name="dataSet">DataSet对象</param>   
    /// <returns>Json字符串</returns>    
    public static string ToJson(this DataSet dataSet)
    {
        string jsonString = "{";
        foreach (DataTable table in dataSet.Tables)
        {
            jsonString += "\"" + table.TableName + "\":" + ToJson(table) + ",";
        }
        jsonString = jsonString.TrimEnd(',');
        return jsonString + "}";
    }
    #endregion

    #region Datatable转换为Json
    /// <summary>     
    /// Datatable转换为Json     
    /// </summary>    
    /// <param name="dt">Datatable对象</param>     
    /// <returns>Json字符串</returns>     
    public static string ToJson(this DataTable dt)
    {
        StringBuilder jsonString = new StringBuilder();
        jsonString.Append("[");
        DataRowCollection drc = dt.Rows;
        for (int i = 0; i < drc.Count; i++)
        {
            jsonString.Append("{");
            for (int j = 0; j < dt.Columns.Count; j++)
            {
                string strKey = dt.Columns[j].ColumnName;
                string strValue = drc[i][j].ToString();
                Type type = dt.Columns[j].DataType;
                jsonString.Append("\"" + strKey + "\":");
                strValue = StringFormat(strValue, type);
                if (j < dt.Columns.Count - 1)
                {
                    jsonString.Append(strValue + ",");
                }
                else
                {
                    jsonString.Append(strValue);
                }
            }
            jsonString.Append("},");
        }
        jsonString.Remove(jsonString.Length - 1, 1);
        jsonString.Append("]");
        return jsonString.ToString();
    }
    /// <summary>
    /// DataTable转换为Json
    /// </summary>
    /// <param name="dt">Datatable对象</param>
    /// <param name="jsonName">JSON名</param>
    /// <returns>Json字符串</returns>
    public static string ToJson(this DataTable dt, string jsonName)
    {
        StringBuilder Json = new StringBuilder();
        if (string.IsNullOrEmpty(jsonName))
            jsonName = dt.TableName;
        Json.Append("{\"" + jsonName + "\":[");
        if (dt.Rows.Count > 0)
        {
            for (int i = 0; i < dt.Rows.Count; i++)
            {
                Json.Append("{");
                for (int j = 0; j < dt.Columns.Count; j++)
                {
                    Type type = dt.Rows[i][j].GetType();
                    Json.Append("\"" + dt.Columns[j].ColumnName.ToString() + "\":" + StringFormat(dt.Rows[i][j].ToString(), type));
                    if (j < dt.Columns.Count - 1)
                    {
                        Json.Append(",");
                    }
                }
                Json.Append("}");
                if (i < dt.Rows.Count - 1)
                {
                    Json.Append(",");
                }
            }
        }
        Json.Append("]}");
        return Json.ToString();
    }

    #endregion

    #region DataReader转换为Json
    /// <summary>     
    /// DataReader转换为Json     
    /// </summary>     
    /// <param name="dataReader">DataReader对象</param>     
    /// <returns>Json字符串</returns>  
    public static string ReaderJson(this IDataReader dataReader)
    {
        StringBuilder jsonString = new StringBuilder();
        Dictionary<string, Type> ModelField = new Dictionary<string, Type>();
        for (int i = 0; i < dataReader.FieldCount; i++)
        {
            ModelField.Add(dataReader.GetName(i), dataReader.GetFieldType(i));
        }
        jsonString.Append("[");
        while (dataReader.Read())
        {
            jsonString.Append("{");
            foreach (KeyValuePair<string, Type> keyVal in ModelField)
            {
                Type type = keyVal.Value;
                string strKey = keyVal.Key;
                string strValue = dataReader[strKey].ToString();
                jsonString.Append("\"" + strKey + "\":");
                strValue = StringFormat(strValue, type);
                jsonString.Append(strValue + ",");
            }
            jsonString.Remove(jsonString.Length - 1, 1);
            jsonString.Append("},");
        }
        dataReader.Close();
        jsonString.Remove(jsonString.Length - 1, 1);
        jsonString.Append("]");
        return jsonString.ToString();
    }
    #endregion


    /// <summary>
    /// 反序列化
    /// </summary>
    /// <typeparam name="T">泛型</typeparam>
    /// <param name="entityString">字符串</param>
    /// <returns>泛型数据</returns>
    public static T DeserializeObject<T>(this string entityString)
    {
        if (string.IsNullOrEmpty(entityString))
        {
            return default(T);
        }
        if (entityString == "{}")
        {
            entityString = "[]";
        }
        return JsonConvert.DeserializeObject<T>(entityString);
    }

    /// <summary>
    /// 序列化
    /// </summary>
    /// <param name="obj">序列化对象</param>
    /// <param name="formatDate">转换数据</param>
    /// <returns>序列化字符串</returns>
    public static string Serialize(this object obj, JsonSerializerSettings formatDate = null)
    {
        if (obj == null) return null;
        formatDate = formatDate ?? new JsonSerializerSettings
        {
            DateFormatString = "yyyy-MM-dd HH:mm:ss"
        };
        return JsonConvert.SerializeObject(obj, formatDate);
    }
}
